4-戊烯-1-醇   、                                                                                      
(1aS,3R,3aS,6aS,6bR)-3-(tert-Butyl-dimethyl-silanyloxymethyl)-tetrahydro-1,2,4,6-tetraoxa-cyclopropa[e]inden-5-one                                                                                                                                                              在
                                                                                                                                                                                 
trifluoromethanesulfonyloxy(triphenylphosphine)gold(I)   、                                                                                                  4 A molecular sieve                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以94%的产率得到(3aS,4R,6R,7R,7aR)-4-(((tert-butyldimethylsilyl)oxy)methyl)-7-hydroxy-6-(pent-4-en-1-yloxy)tetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-2-one